linux-kernel - Re: [PATCH tip/core/rcu 11/17] rcu: Bind grace-period kthreads to non-NO_HZ

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Message-ID: <alpine.DEB.2.11.1407111309150.4777@gentwo.org>
Date:	Fri, 11 Jul 2014 13:10:41 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com,
	edumazet@...gle.com, dvhart@...ux.intel.com, oleg@...hat.com,
	sbw@....edu
Subject: Re: [PATCH tip/core/rcu 11/17] rcu: Bind grace-period kthreads to
 non-NO_HZ_FULL CPUs

On Tue, 8 Jul 2014, Frederic Weisbecker wrote:

> > I was figuring that a fair number of the kthreads might eventually
> > be using this, not just for the grace-period kthreads.
>
> Ok makes sense. But can we just rename the cpumask to housekeeping_mask?

That would imply that all no-nohz processors are housekeeping? So all
processors with a tick are housekeeping?

Could we make that set configurable? Ideally I'd like to have the ability
restrict the housekeeping to one processor.

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